TeamViewer Remote

TeamViewer Patches High-Severity Flaws Allowing Remote Command Execution and Unauthorized File Writes

TeamViewer has addressed two high-severity vulnerabilities in its remote access clients that could enable attackers to execute commands and write files to unauthorized locations. The more critical issue, tracked as CVE-2026-19042 with a CVSS score of 8.8, affects Full Client and Host versions on Linux prior to 15.81.5 and permits command execution with the privileges of the logged-in user. Exploitation requires the attacker to be on the victim's contact list or for the victim to accept messages from external users. The second flaw, CVE-2026-16444 rated at CVSS 7.5, stems from improper file path validation and impacts Windows, macOS, and Linux clients before version 15.81.5, allowing path traversal sequences in transferred files or clipboard content during remote sessions. Legacy versions of TeamViewer 13, 14, and editions for Windows 7 and 8 also received targeted fixes. No active exploitation was observed at the time of disclosure, and the vendor urges immediate migration to the latest release.